Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

• Proteins
• Lipids
• Glycogen
• Nucleic Acid

Tags

NGSS.HS-LS1-1

A cell with a predominance of free ribosomes is most likely

• constructing an extensive cell wall or extracellular matrix.
• enlarging its vacuole.
• producing primarily cytoplasmic proteins.
• digesting large food particles.

Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

• smooth endoplasmic reticulum
• mitochondrion
• contractile vacuole
• ribosome

Tay–Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition?

• mitochondria
• membrane–bound ribosomes
• the lysosome
• the endoplasmic reticulum

Tags

NGSS.MS-LS1-2

In a plant cell, DNA may be found

• only in the nucleus.
• in the nucleus, mitochondria, chloroplasts, and peroxisomes.
• in the nucleus, mitochondria, and chloroplasts.
• only in the nucleus and mitochondria.

Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?

• vacuole
• peroxisome
• Golgi apparatus
• mitochondrion

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

• cellulose fibers in the cell wall
• cytoskeletal structures
• sites of energy production in cellular respiration
• ribosomes

Which of the following contain the 9 + 2 arrangement of microtubules, consisting of nine doublets of microtubules surrounding a pair of single microtubules?

• centrioles only
• both motile cilia and primary (nonmotile) cilia
• both flagella and motile cilia
• both centrioles and basal bodies

Plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells?

• tight junctions
• gap junctions
• desmosomes
• extracellular matrix

Which of the following is present in a prokaryotic cell?

• mitochondrion
• chloroplast
• ribosome
• ER